Why Does My Vision Go Blurry When I Stand Up? POTS and Visual Symptoms Explained

If you have POTS, you already know the heart racing part. What catches people off guard is what happens to their eyes. You stand up from the couch or get out of bed, and for a few seconds the room goes soft at the edges, or grey, or you feel like you are looking through a slightly fogged window. Some patients tell me their vision tunnels in, others describe stars or static, and a lot of people just say everything goes "swimmy" for a moment.



If this happens to you, I want you to know two things straight away. It is a real, measurable neurological event, and it makes complete sense once you understand what your nervous system is doing in that moment.

What Is Actually Happening When Your Vision Blurs on Standing

Your eyes are one of the most metabolically demanding tissues in your body. The retina, at the back of your eye, uses a huge amount of oxygen and glucose relative to its size, and it depends on a steady, well regulated blood supply to keep working properly.

When you go from sitting or lying down to standing, gravity pulls roughly half a litre of blood down into your legs and abdomen within seconds. In a nervous system that is regulating well, blood vessels constrict quickly and your heart rate lifts slightly to push blood back up to your brain and eyes before you notice anything at all.

In POTS, that adjustment is delayed or inefficient. For a brief window, blood flow and oxygen delivery to the brain and the visual system drop below what they need. Your vision is often the first thing to tell you about it, because the visual pathway is so sensitive to even small dips in perfusion, which is the medical term for how well blood is reaching a tissue.

The Link Between Blood Flow and Your Eyes

The visual cortex, the part of your brain that processes what your eyes see, sits at the back of the brain and relies on the same circulation system that struggles during a postural change in POTS. When blood flow drops even slightly, the visual cortex is often affected before other areas, which is why blurring, dimming or greying out can appear before you feel dizzy or before your heart rate change is even obvious to you.

This is sometimes called orthostatic visual disturbance. Orthostatic simply means related to standing upright. It is your nervous system giving you an early, honest signal that circulation has not caught up with your position change yet.

Why the Visual System Is an Early Warning Sign

I explain to my patients that the visual symptoms are not a separate problem from POTS. They are part of the same story I have written about before, where POTS is a nervous system regulation issue rather than simply a heart rate problem. The eyes, the inner ear, the brainstem and the blood vessels are all part of one connected system that is meant to work together automatically every time you change position. When that coordination is inefficient, vision is often where you feel it first.

Common Visual Symptoms Reported in POTS

Patients describe this experience in slightly different ways, and all of the following are consistent with what I see clinically:

• Blurring or softening of vision for several seconds after standing
• Vision going grey, dark or "whiting out" briefly
• Tunnel vision, where your peripheral vision narrows
• Seeing spots, static or shimmering
• Increased sensitivity to light
• Eyes feeling tired or strained by midafternoon
• Difficulty focusing on screens or text after being upright for a while

If these symptoms ease within ten to twenty seconds of standing, or resolve once you sit back down, that pattern fits with the orthostatic changes seen in POTS. If visual disturbance is constant, one sided, or comes with sudden severe headache, slurred speech or weakness, that needs urgent medical assessment rather than a POTS explanation, and I would always want you to see a doctor for that first.

Is It Just POTS, or Could Something Else Be Contributing

Visual symptoms on standing are common in POTS, but a few other things can look similar and are worth ruling out or managing alongside it.

Vestibular involvement

The inner ear balance system works closely with your eyes through what is called the vestibulo ocular reflex, which keeps your vision stable while your head moves. If this reflex is not working smoothly, standing can trigger both dizziness and visual disturbance together. This overlaps with what I cover in my article on balance disorders and in my piece on the causes of dizziness, vertigo and ongoing unsteadiness.

Migraine

Some people with POTS also experience migraine, and visual aura from migraine can be mistaken for a POTS related visual episode, or the two can trigger each other. I go into this in more detail on my migraines page.

Anxiety

Because the physical sensations of a POTS episode, including a racing heart and visual changes, can feel alarming, it is common for anxiety to build around them. This does not mean the symptoms are caused by anxiety. I have written specifically about why POTS and anxiety are so often confused, because untangling the two matters for getting the right support.

Blood pressure and hydration status

Low blood volume, dehydration and low salt intake all make orthostatic symptoms more pronounced, including visual ones.

What You Can Do About It

There is a lot within your control here, and small changes often make a noticeable difference to how your vision and overall symptoms behave when you stand.

Stand up in stages

Rather than going from lying flat to standing in one movement, sit on the edge of the bed for thirty seconds, then stand and pause holding onto something stable before you walk off. This gives your circulation a chance to catch up.

Use counter pressure manoeuvres

Crossing your legs, tensing your thigh and calf muscles, or clenching your fists and forearms for ten to twenty seconds while standing can help push blood back toward your heart and brain more quickly.

Stay ahead of hydration and salt intake

Many people with POTS are advised to increase fluid and salt intake as part of their management plan. This is something to discuss with your GP or cardiologist, since the right amount varies from person to person and depends on your overall health.

Wear compression garments

Compression tights or an abdominal binder can reduce the amount of blood pooling in your legs and abdomen when you stand, which in turn reduces the drop in blood flow to your eyes and brain.

Pace your mornings

Symptoms including visual ones are often worse first thing, since blood volume is typically lowest after a night lying flat. Building in a slower, staged start to your day can make a real difference.

Track your patterns

Note when visual symptoms happen, how long they last and what you were doing beforehand. This is genuinely useful information for me or your treating doctor when working out what is driving your symptoms and how to target treatment.

How I Approach This as a Neuro Rehab Chiropractor

When a patient comes to me with POTS and visual symptoms on standing, I am not just looking at the eyes in isolation. I am assessing how well your vestibular system, your eye movement control, your brainstem and your autonomic nervous system are communicating and coordinating with each other during postural change.

This includes:

• Oculomotor testing, to see how well your eyes track and stabilise
• Vestibular assessment, since inner ear input directly affects visual stability
• Active stand testing, to measure your heart rate and symptom response over time
• Postural and sensorimotor assessment, to understand how your whole system is adapting to gravity

The aim is to find which part of the system is struggling to regulate, then use targeted rehabilitation to improve that coordination over time. This sits within my wider approach to POTS and dysautonomia care, and it works alongside your GP, cardiologist or neurologist rather than replacing that care.

If you want the fuller picture of how I structure a POTS treatment plan from the first assessment onward, I have written about that in more detail in POTS Treatment in Melbourne and Online Australia Wide. And if fatigue and exercise intolerance are part of your picture too, my article on POTS and exercise explains why pushing through often backfires and how to progress more safely.

When to Seek Further Medical Assessment

I always want my patients working with their broader medical team, particularly around visual symptoms. Please see a doctor promptly, or seek urgent care, if you experience:

• Sudden, severe or one sided vision loss
• Visual disturbance that does not resolve when you sit or lie down
• Vision changes with chest pain, fainting, slurred speech, facial drooping or arm weakness
• New visual symptoms that feel different from your usual pattern

These can indicate something beyond POTS and need proper medical evaluation first.

Living in Melbourne With POTS and Visual Symptoms

If you are in Melbourne or the bayside area, you do not need to keep working around blurry vision every time you stand up. In my Highett clinic, I see this pattern often, and it responds well to a structured, whole system approach that looks at your brain, spine and body together rather than treating each symptom on its own.

You do not need a GP referral to see me, and if you already have specialist reports or a POTS diagnosis, I would love you to bring them along so we can build on the assessment you already have.

Book your initial assessment here and let's start working out exactly what your nervous system needs to regulate more smoothly when you stand.

Research Articles

• Robertson D. The Pathophysiology and Diagnosis of Orthostatic Intolerance. American Journal of the Medical Sciences. 1999;317:75 to 77.
  
• Low P A et al. Postural Tachycardia Syndrome (POTS). Neurology. 1995;45:S19 to S25.
  
• Wieling W et al. Symptoms and Signs of Syncope: A Review of the Link Between Physiology and Clinical Clues. Brain. 2009;132:2630 to 2642.
  
• Sheldon R S et al. Heart Rhythm Society Expert Consensus Statement on Postural Tachycardia Syndrome. Heart Rhythm. 2015;12:e41 to e63.
  
• Arnold A C et al. Postural Tachycardia Syndrome Mechanisms and Management. Journal of the American College of Cardiology. 2018;72:1883 to 1896.
• Rodriguez B, Pantano L, Nef T, Müri RM, Z’Graggen WJ. Visual symptoms in postural tachycardia syndrome: An investigation of position-dependent visual exploration. European Journal of Neurology. 2025;32(1):e16507.